US PATENT SUBCLASS 75 / 478
.~.~.~.~.~.~ Solid reductant is recycled

Current as of: June, 1999
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75 /   HD   SPECIALIZED METALLURGICAL PROCESSES, COMPOSITIONS FOR USE THEREIN, CONSOLIDATED METAL POWDER COMPOSITIONS, AND LOOSE METAL PARTICULATE MIXTURES

330  DF  PROCESSES {9}
392  DF  .~ Producing or treating free metal {10}
414  DF  .~.~ At 300 degrees C or greater (e.g., pyrometallurgy, etc.) {7}
433  DF  .~.~.~ Iron(Fe) {18}
474  DF  .~.~.~.~ Reduction in rotary kiln {3}
477  DF  .~.~.~.~.~ Introducing solid reductant into rotary kiln {3}
478.~.~.~.~.~.~ Solid reductant is recycled

DEFINITION

Classification: 75/478

Solid reductant is recycled:

(under subclass 477) Process wherein solid reductant discharged from the rotary kiln is recycled back into the rotary kiln.

(1) Note. The solid reductant is usually discharged from the kiln with Iron (Fe), separated from the Iron (Fe), and then recycled.